This unit is triggered by a push button switch which can be remote-mounted in the location specified by the rules, in multiple locations.Ĭartek isolators are designed to meet FIA requirements for electrical master kill switches. This latter method of engine kill means that the XR is smaller and lighter than the GT and incorporates a sealed, circular connector.The Cartek GT Battery Isolator is a solid-state electrical master switch kit that can be mounted close to the battery, for shorter cable runs. The GT unit has a 30A switched power output which can be used as the main power feed for most ECUs and/or ignition systems while the XR unit outputs a low current, ‘Ignition Off’, signal which is compatible with most motorsport ECUs and PDMs. However, the main difference between these two units is the method used to stop the engine. The Cartek Battery Isolator meets these requirements.Ĭartek produces two types of Battery Isolator GT and XR.īoth systems isolate the battery from all electrical circuits, in accordance with FIA requirements, by disconnecting the negative terminal of the battery from chassis/earth. However, most FIA race and rally championships require cars to be fitted with a spark-proof master switch to isolate the battery from all electrical systems and stop the engine. Unlike race seats, harnesses and fire extinguishers the FIA does not have an approval procedure for Master Switches. These microprocessors also monitor the kill switches/buttons for instant activation without false triggering. The two electronic isolation circuits are controlled by microprocessors and incorporate various safety systems including over-temperature and over-current monitoring.
The unit will instantly trigger into isolation mode when any of the kill buttons are struck or on detection of any fault or break in switch wiring circuits.īoth the Battery Isolator GT and Battery Isolator XR come with built in alternator run down protection meaning no extra wiring and no extra components. If any of the Formula Ford cars would end up against a barrier or upside down, it then allowed a marshall to always have access to kill the engine. This was implemented by Ford in the Formula Ford Ecoboost series. The ECU or Power Distribution Module will then shut down when it see’s this signal – which then kills the engine.The new Battery Isolator XR also features a 0.5 sec time delay between transmitting the engine kill signal and disconnecting the battery allowing ECUs time to perform a shutdown sequence before electrical power is lost.Īs Cartek Battery Isolators use ‘push to break’ external kill buttons it then allows use of two external buttons to be fitted in series. Instead it sends a signal which is wired up to either a Power Distribution Module or Motorsport ECU that has an ignition switch signal input. XR: This unit does not have a power input or power output. Designed for cars with Standard ECU’s or Historic Race cars. When the negative side of the battery has been disconnected it will also cut the 12v output powering your Ignition or ECU. GT: This kills the engine by taking in a fixed 12v input and sending a 12v output that would power your Ignition or ECU. To kill the Engine there are two options of Battery Isolator, the GT kit or the XR. This means that no power can get to any of the electrical circuits as there is a break in the circuit. When the external kill button has been activated or the internal button been switched to the off state, then the Battery Isolator will disconnect the negative side of the battery from the Chassis.
The Battery Isolators work by being fitted in between the negative side of the battery and the chassis ( As seen above ). The first is to disconnect the Battery from all Electrical Circuits. The Cartek Battery Isolators provide two functions. These solid state battery Isolators are also filled with a hard setting resin which prevents any ingress of dust, dirt or water therefore further increasing their strength and reliability. Solid state means no moving parts, all power switching is fully electronic.Įarly types of electrical isolation were by large mechanical master-switches while more modern systems have utilised electro-mechanical solenoids.īoth of these types of systems contain mechanical electrical contacts which, due to the combination of high electrical current and the shocks and vibration of the race car environment, sparking between the contacts occurs which results in contact erosion and eventual unreliability. Fully sealed with no moving parts meaning you can always rely on Cartek kits to work in the tough environments of motorsport.
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